Valve and cock



E. BQWHITMARSH 1,760,222 I VALVE AND COCK May Z7, 1930.-

Fled Jan. 8, 1927 Patented May 27, 1930 STATES ERNEST B. WHITMARSH, F DETROIT, MICHIGAN, ASSIGNOR TO DETROIT BRASS AND MALLEABLE WORKS, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN VALVE AND COCK *Application filed January 8, 1927. Serial No. 159,773.

My invention aims to provide a novel valve or cock construction wherein a countersunk and partially concealed stop member limits the adjustment of a plug in the valve or cock body. In such valvular structures it is the common practice to provide an end of the plug with a. pin or shoulder engageable with a complemental pin or shoulder of the cock body, to define an opened or closed position of the plug. Such construction, as well as others permits of the accumulation of dirt and foreign matter which in time interferes with full adjustment of the cock plug. Then again, pins and other protuberances are liable to be broken, and at the-best do not contribute to the appearance of a well designed cock, especially when usedin connection with a gas range or the like.

My improved construction prevents the lodgment of dirt, insures a positive stop action for the cock plug, eliminates all stop protuberances, and provides a construction that may be manufactured at a comparatively small cost.

Other advantages of my invention will appear as the construction is better understood by reference to the drawing and the de tail description thereof.

Figure 1 is a vertical longitudinal sectional view of the valve or cock, partly in elevation, showing the cock in an open position;

Fig. 2 is a side elevation of the same, partly broken away;

Fig. 3 is a bottom plan of the cock partly in horizontal section;

Fig. 4 is aperspective view of a portion of the cock body with a naked plug stem or tang protruding therefrom, and

Fig. 5 is a perspective view of a detached stop or washer member.

In the drawing, the reference numeral 1 denotes a cock body having a tapered plug seat or bore 2 which is tapered inwardly from the upper end of the body to the lower end thereof. The body is provided with diametrically opposed inlet and outlet connections 3 and 4 respectively communicating with the bore or plug seat 2 of the cock body. The outlet connection 4 may be provided with a gas and air mixer or nozzle 5, or may be of any well known construction.

Rotatable inthe bore or on the seat 2 of the cock body 1 is a tapered plug 6 having the upper end thereof provided with a conventional form of'handle 7. The tapered p0rtion of the plug 6 may be of less length than the tapered seat 2 and the lower end of the plug terminates in a stem or tang 8 having opposed facets 9 and 10. The lower portion of the stem is reduced, as at 11, and screwthreaded, as at 12. This stem may be considered as having been originally cylindrical, had its lower end reduced and screw-threaded and then opposed sides thereof cut away or flattened so as to form the facets 9 and 10.

For rotatably retaining the plug 6 on its seat 2 a'coiled spring 13 and an abutment 14 are employed. The abutment 14 may be in the form of washers or jam nuts screwed on the threaded portions 12 of the plug stem, and in some instances the extremity of the plug stem may be peened or otherwise .upsetto prevent unscrewing or displacement of the abutment 14.

The spring 13 is of the coiled type encircling the stem with its expansive force eX- erting a downward pressure on theplug 6 so as to retain said plug in frictional engagement with the seat 2.

The lower end of the cock body is counterbored to provide an annular seat 15 about or at the lower end of the seat 2, and the .formation of the seat 15 provides an annular vertical wall or protecting flange 16. or liange has a single radially disposed slot or notch 17, best shown in Figs. 3 and 4. Counterboring the lower end of the cock body 'provides a recess'for a washer or ring-like stop member 18 which when properly fitted in the counterbored lower end of the cock body is flush with the lower end and partly concealed. The exposed face of the stop member affords an end abutment for the coiled spring 13, as best shown in Fig. 1. Y

The outer annular wall of the stop member 18 has a radially disposed lug 19 extending into the slot or notch 17 to prevent rotation of the stop member in the cock body. The inner wall ofthe stop member 18 is formed with This wall diametrically opposed double shouldered in wardly extending lugs 2O engageable by the facets 9 and l0 of the plug stem 8. The lugs 20 are of such size and so disposed that the shoulders ol' said lugs will be in parallel planes with the planes of one set of shoulders at a right angle to the planes of the other set of shoulders, whereby the lugs 2O may cooperate in limiting rotation of the stem 8 and contine vsuch rotation to a quarter turnor approX- imately ninety degrees. This will insure alinement of a plug passage 2l with the connections 3 and 4r or closure of such passage by the same being placed transverse to the axis orv the connections 3 and l.

Obviously the cock body can be cast or otherwise termed to provide the recess and notch for the stop member 18; that this stop member can be easily and quickly produced and readily assembled, and while in the drawing there is illustrated a preferred embodiment of my invention, it is to be understood that the cool; construction is susceptible oit sueh changes as are permissible by the appended claims.

lVhat ,l claim is i l. The combination ol' a cock body having inlet and outlet connections, said cock body having the lower end thereof provided with a slot anda recess, a rotatable plug in said body and having a stem protruding from the lower end of said body, said stem having a pair or" parallel `facets termed thereon and extending entirely across the same, a stop member mounted-in the recess oit the cook bodyand projecting into the slot thereof to prevent rotation of said stop member relative to saidcoek body, and inwardly projecting means carried by said stop member and engageable by the facets of said'stem for delining the rotation of said plug in said cock body. y

il, ln a valve ot the class described, a valve casing having a tapered valve seat and having a counterbore surrrounding the small end ot the tapered valve seat, a rotatable valve plug` disposed in the seat and having a lat'- tened portion extending through the counterbore end of the casing and some' distance tlieieb'elow, that portion ot' the plug which is within Vthe counterbore providing shoulders, astop washer disposed in the counterbore and having abutnients tor said plug shoulders whereby tolmitmovement ofthe plug, a nut screwed' to the lower projecting end oit the i'lattened portion of the rotatable valve plug, and a spring arranged on sait {latten-ed portion and bearing at its lower end againstthe nut and at its opposite end against the stop washer and serving both' to hold the plug` toits. seat and the stop washer in its locking position. i 1 f z 3. ln'a valve of the class described, a'valve casing having` a tapered valve seat and having a counterbore surrounding the small end or the tapered valve seat, a rotatable valve plug disposed in theseat and having a longitudinally recessed portion on lits lower end adapted to be arranged partly within said eounterbore, said recessed portion providing shoulders, a washer :adapted to Slide on said plug into said counterbore and having a stop tooth projecting into the recess to cooperate with said shoulders in limiting the rotation ot the valve plug, and means ter locking said washer to the valve casing, i

et. In a valve of the class described, a valve easing having a tapered valve seat andhaving a counterbore surrounding the small end of the tapered'valve seat, a rotatable valve plug disposed in the seat and having a screw-threaded stem on its small end extending through said counterbore, said screwthreaded stemhaving a a longitudinallyrecessed portion providing shoulders, a washer adapted to slide on said stem to a position in the counterbore and having a stop tooth projecting into the recess to cooperate with saidshoulders in limiting rotation of the valve plug, means forA locking the washer against rotation rwith reference to the valve easing, a nut screwed on the outer end ot the threaded stem, and a compression spring surrounding vthe stem and bearing at its lower end against the nut and at its upper end against the stop washer, the spring serving both to hold the plug to its seatand the stop washer in its locking position. i

ln testimony whereof I aliix my signature.

ERNEST B. NHITh/lARSH.

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